I've searched for hours and can't find an answer. Logically I presume the answer is no, but...
If a married couple are renting a car and spouse A does the AutoSlash booking process, can he add every card and/or affiliation that both spouses have, or just his own? For example, spouse A has a USAA card and AARP membership, while spouse B has a Mastercard and Delta Sky Miles.
Also, how are these affiliations proven? Is it once you arrive at the rental counter, or? In the case of a qualifying credit card, is presenting it in person the common method of validating it's existence or is it verified online somehow?